High Power Film Capacitors
FILFIM Series
DC FILTERING
26
High Power Film Capacitors
FILFIM Series
DC FILTERING
27
In 1979, TPC (formerly LCC, then THOMSON-CSF PASSIVE
COMPONENTS) developed the
CONTROLLED SELF-HEALING
technology
for high power capacitors.
In 1988, TPC further evolved the
CONTROLLED SELF-HEALING
technology
for use in impregnated DC filtering capacitor (TRAFIM
series). This product range has been a great success with several
companies buying the TRAFIM license.
These capacitors made great advances over previous technologies
by combining the benefits of the Controlled Self-Healing process
and superior energy densities due to impregnation, making it one of
the most compact capacitors on the market for 1/2 CV
2
.
Today, TPC produces impregnated capacitors for high voltage
filtering, on the voltage range from 6kV to 32kV, using the same
technology as used in the TRAFIM series: “FIM technology”.
In the past, such filtering capacitors used foil electrodes. Any defect or
weak point in the film could provoke the catastrophic failure of the
capacitor involving a short-circuit with risk of explosion.
Now with the
CONTROLLED SELF-HEALING,
the capacitance is
divided into several millions elementary capacitances protected by
“fuse gates”. Weak points of the dielectric are insulated and the
capacitor continues functioning normally without any short circuit or
explosion.
The capacitor acts like a battery while working, it “consumes” a
certain amount of the capacitance through the gradual breakdown
of the individual capacitance “cells”. Over the life of the capacitor,
the capacitance gradually decreases. At the end of the capacitor’s
life, the nominal capacitance will decrease down to
2%.
High Power Film Capacitors
FILFIM Controlled Self-Healing Technology
DC FILTERING
CONTROLLED SELF-HEALING TECHNOLOGY
The FILFIM technology is based on the controlled self-
healing properties of the segmented metallized film. The
capacitance is divided into several million elementary capac-
itance cells protected by “fuse gates”.
The combined effect of metallization resistivity and segmen-
tation design induces two sensitivities of fuse effect. This can
be schematized (equivalent circuit) in the figure below.
DC FILTERING
• Small weak point leading to low self-healing energy then
few mm
2
are insulated.
• Greater defect requiring higher self-healing energy. In that
case an elementary cell is insulated.
below is an example of a simple regeneration
and an example of a cell insulation
The capacitor acts like a battery. While working, it consumes
a certain amount of the capacitance through the gradual
breakdown of the individual capacitance “cells”.
At the end of the capacitor life, the decrease of the initial
capacitance reaches 2%.
28
High Power Film Capacitors
FILFIM General Description
DC FILTERING
DC FILTERING
FILFIM capacitors are segmented metallized film capacitors impregnated with vegetable oil.
The FIM technology name stands for:
F
ilm
polypropylene
I
mpregnant
rapeseed oil
Metallization aluminum
APPLICATIONS
High DC voltage filtering:
Active compensating –
(FACTS, STATCOM, SVC, UPFC...)
HVDC
High power DC supply
Substation
PACKAGING
Rectangular stainless steel case. Two termi-
nals with connection specially designed for
customers applications. Normally, grounding
is via nuts located on the top of the case. On
option one terminal and case connection.
ELECTRICAL CHARACTERISTICS
Capacitance range C
n
Tolerance on C
n
(for ±5% see specific requirements)
DC voltage range
Standard reference
8.2µF to 475µF
±10%
5.9 kVdc to 31.7 kVdc
Conforms with IEC 1071
T
he catalog shows a standard product range. If your requirement is different from the values shown here, either mechanically or electri-
cally, our technical department is at your disposal to design a capacitor specifically suited to your particular specification. On page 39,
a guide can help you make your request. Please send it to your local AVX representative.
PART NUMBER / HOW TO ORDER
D
L
I
F
M
A
2
M
J
3
4
8
5
A
B
C
D
(1) Terminal 1 used from voltage A - 1
Terminal 2 used from voltage J - R
Cross Section and Option
Terminal
Type
(1)
185 x 350 2 terminals
1-2
185 x 515 2 terminals
185 x 350 1 terminal + case (see drawings
185 x 515 1 terminal + case on page 35)
Fixing
M = brackets
A 5920
B 6640
C 7920
D 8890
E 9680
F 10,600
Voltage
G 11,800 M17,760
H 13,300 N 19,900
I 15,800 O 23,800
J 17,800 P 26,700
K 19,400 Q 29,000
L 21,100 R 31,700
Capacitance
EIA Code
(2)
(2) The first three digits are the capacitance and the last digit is the number of 0 to add to obtain the value of the capacitance in pF.
For example a 29.4 µF is coded as 2945 and a 41 µF is coded as 0416.
MARKING
The color of the case is gray with the following information on the label usually located 50mm from top of the case and
centered on the length:
Logo
Part number
Capacitance and tolerance in clear
Rated voltage in clear
Test voltage between terminals and case
Batch and serial number
Date of manufacture
29
High Power Film Capacitors
DC Filtering Definitions (According to IEC 1071-1)
ELECTRICAL CHARACTERISTICS
Capacitance C
n
Working current I
rms
Maximum current I
max
DC voltage
Rated DC voltage V
n
Nominal value of the capacitance.
r.m.s. value current for continuous operation.
Maximum r.m.s. current for continuous operation.
Continuous voltage value.
Maximum operating peak voltage of either polarity
(non-reversing type waveform), for which the capacitor has been
designed for continuous operation.
Value of the maximum operating recurrent voltage for a given hot spot
temperature and expected lifetime.
Peak-to-peak alternating component of the unidirectional voltage.
Ripple voltage frequency.
An effective resistance which, if connected in series with an ideal
capacitor of capacitance value equal to that of the capacitor in
question, would have a power loss equal to active power dissipated
in that capacitor under specified operating conditions.
Capacitor serial self-inductance.
Ratio between the equivalent series resistance and the capacitive
reactance of a capacitor at a specified sinusoidal alternating
voltage and frequency.
r.m.s. rated value of the insulation voltage of capacitive elements and
terminals to case.
DC FILTERING
Working voltage V
w
Ripple voltage V
r
Working frequency f
Equivalent series resistance R
s
Stray inductance L
s
Tangent of loss angle tan
δ
Insulation voltage V
I
THERMAL CHARACTERISTICS
Cooling air temperature
θ
amb
(°C)
Temperature of the cooling air measured at the hottest position
in the bank, under steady-state conditions, midway between two
units. If only one is involved, it is the temperature measured at a point
approximately 0.1 µ away from the capacitor container and two-thirds
of the height from its base.
Highest temperature obtained inside the case of the capacitor in
thermal equilibrium.
Temperature of the hottest point on the case of the capacitor in
thermal equilibrium.
Lowest temperature of the case at which the capacitor may
be energized.
Highest temperature of the case at which the capacitor
may operate.
Hot spot temperature
θ
HS
(°C)
Operating temperature
θ
(°C)
Minimum operating temperature
θ
min
(°C)
Maximum operating temperature
θ
max
(°C)
30
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